wennersten



(No Model.) 2 Sheets-Sheet 1.

J. P. WBNNERSTBN.

HORSESHOE NAIL FINISHING MACHINE.

No. 891 19 n Patented LLlJ LLM

27ans. Pnowulhognphn. wnmnaiw. nc.

(No Model.) 2 Sheets-Sheet 2.

J. P. WENNERSTEN. HoRsEsHoE NAIL PINISHING MACHINE.

Nq 1,1o2l Patented 0ct.16,1888.

lUNiTnn STATES PATENT OFFICE.

JOHN I). VENNERSTEN, OF CHICAGO, ILLINOIS, ASSIGNOR OF IVOTHIRDS TO AUGUST JOHNSON AND J. AUGUST J OHANSON, OF SAME PLACE.

HORSESHOE-NAIL-FINISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 391,102, dated October 16, 1888.

(No model.)

To @ZZ whom, t may concern:

Beit known that I, JOHN P. WnNNEnsrEN, a subject of the King of Sweden, residing at Chicago, in the county of Cook and State of lllinois,have invented a new and useful Horse shoe-Nail Machine, of which the followingis a full and exact specification.

My invention relates to that class of machines in which pairs of roller-dies receive the Io blank form of the nail in die-recesses upon their periphery and swage it therein into finished shape.

The object is particularly to provide simplified mechanism which will be certain in the functions of feeding, pointing, and separating the finished nail from the cut-off portion.

In the drawings illustrative of my invention, Figure 1 is an end elevation of the machine, showing the principal operative mechanism.

2o Fig. 2 is a side elevation. Fig. 3 is a transverse sectional view of the principal operative mechanism, taken on line 1 l of Fig. 2. Fig. et is a transverse sectional view taken on line 2 2 of Fig. 2. Fig. 5 is a broken transverse sectional View taken on line 3 3 of Fig. 2, illustrating the front bearings of the shafts of the roller-dies and the means of taking up the wear of the same. Figs. 6 and 7 are perspective views of the component parts of the female die, which forms the point of the nail. Fig. 8 is a perspective view of the male die. Fig. 9 is a detail sectional view on line 4 4 of Fig. 3. Fig. 10 is an end view of the female die with the blank nail shown in dotted lines in position for pointing. Fig. 11 is a view of the finished nail and of the clipped portion. Fig. l2 is a sectional View of the nail-feeding tube, taken on line 5 5 of Fig. 3. Fig. 13 is a longitudinal section of the same piece, taken 4c on line 6 6 of Fig. l2.

Like letters throughout the several views indicate similar parts.

A indicates the main frame of the machine; A and A2, front and rear standards rising from its base A3. The standards are recessed at their tops tc receive brasses a, in which to carry the roller-die shafts B. The shafts B are geared to revolve at a uniform speed toward each other through the pinions B2. 'The 5o produced rear end of one of them is provided with a gear, B, which meshes intoapinion, B,

in tu rn actuated by pulley or other convenient driving mechanism. Upon the forward ends of the shafts B are keyed roller-dies C, which revolve toward each other and have a line of tangential contact in the plane which passes through their two axes. These rolls are of hardened steel, and are provided with die-recesses in their surface, or wholly within the surface of one of them, the recesses being of 6o the form and size of the nail required. Preferably two of these recesses are sunken into the roll, as shown more particularly in Fig. 3,

as this permits of giving the rolls a very satisfactory size. The nails are cut from the bar metal in the usual manner of a size and form approximating as nearly as practical the finished nail.

The contact of the two rolls is maintained against the outward pressure produced by the 7o swaging action of the nail and the consequent uniformity of the nails in thickness assured by the arrangement of keys and journal-brasses shown in Fig. 5. Tightening keys or wedges a and an expanding-key, a, are so arranged and manipulated by nuts engaging the threaded cylindrical end of these keys that very accurate adjustment aud great solidity of structure are obtained. Above the rolls, at their tangential line, is arranged a feeding- 8o tube, D, of such length as to afford room for several nail-blanks one above the other. A finger-valve, d, is arranged to operate through a slot in the side of the tube and to drop the nail-blanks into the dies inthe rolls below at 85. proper intervals, in a like manner to the operation of the same mechanism described in my previous patent, No. 358,904. These blanks are forced into the recesses and shaped exactly to them, the surplus metal being elon- 9o gated into a thin wedge-like end, which eX- pands over into the recess c at the end of the die-recess. As the nail leaves the rolls, the head is received upon the projecting knifeedge D and held in Contact therewith by the pressure-bar D, forming the opposite side of the tube, and maintained in position by the spring D3, secured to the arched lug d2. The purpose of thus guiding the nail is to prevent irregularities of motion and consequenttwist 10o 2 coinc ing of the nail as it leaves the roll. When released from the knife-edge, the nail drops and is received upon the end of the finger E, sliding in the guide-casting E.

The mechanism for pointing the nail,which is the finishing operation, will now be de-y scribed.

Adjustably secured to the frame of the machine is a die-holding block, F, carrying the female die G, the symmetrical halves of which areshown more clearly in Figs.6 and 7. By constructing this diein parts cheapness in first construction and conveniencein subsequentsharp- Y ening and fitting are obtained. The socketin which the dies are received in the die-block is somewhat larger in width than the dies, allowing them to be adjustable within it, held in position by set-screwsf, threaded into the sides of the die-block. A die-holding arm, H, is pivoted to the frame ofthe machineupona stud, h, and has a limited oscillation, deter-mined by a cam, I,which rotates in contact with a friction-roll, H', carried by the extreme free end ofthe arm. A shaft, I', extends rearwardly from the cam, and is supported in journalboxes t' in the frame of the machine and driven two revolutions to one revolution of the rolls by suitable connecting-gears, l2 I3, for the pur-l pose of causing two operations of the dies to correspond with the number of the recesses in the surface of the rolls.

A male die, J, of proper size and proportion is secured in the upper end of the arm H in a socket therein and registers with the female die placed opposite to it. A set-screw, j, is threaded into the rear wall of the socketand abuts against the end of the die,;regulating the distance which it projects from beyond its socket. A spring,K, maintains the arm with the die in its out position,with roll H resting against the cam I. Aguide-fork, L, is located immediately above the die J and slides -within a recess made in the upper wall of vthe socket. It is `normally thrown forward by a spring, M, one leg of which is fixed to a lug on the arm H. The side of the feeding-tube D is cut away the necessary amount at this point to permit the die and guide-fork to pass through it.

It will be supposed that the nail has been dropped from the rolls, and,descendingl through the tube, rests with its head upon the retractible finger E, with one of its flat sides resting in position, as shown most clearly in Fig. 10, against the face of the female die. The cam I now revolves and brings its enlarged diameter 2 against theroll H', forcing the arm H forward in opposition to the resistguideway, drops into a receptacle placed be' low to receive it. By the continued rotation of the caml the arm His permitted to return to its first-described position, forced thereto by the spring K. rlhe guidefork releases the nail-clipping, which descends in the channel of the tube. The finger F has in the meanwhile been withdrawn from its normal position by suitable time mechanism and no longer ob.- structs the passage of the clip, which now passes out through the bottom of the tube to the right of the division-wall aand drops into the chu-te a2 and into a receptacle placed to receive it.

To retract the nger E the mechanism shown particularly in Figs. 1, 2, and 3 may be conveniently used. The rear end of the nger is produced through the guidepiece E2 and carries a spring, e, coiled about it, which abuts upon a shoulder thereon and at its other end against the piece E2, to normally maintain it in a forward position. An arm, O, extends upward from its pivoting-point o, connects midway with the finger E, and has its free end lying in the path of rotation of a lug, p, projecting from an adjustable collar, l?, situate upon the shaft I immediately to the rear ofthe cam I. This collar may be set to accurately regulate the time of opening and closing of the finger, and thus determine the length of interval which elapses in which the clipping may pass out and yet retain in the tube the nails above it.

Various modified forms of valve and oper,` ative mechanism may bc devised for affording a rest for the nailhead capable of retraction to allow of the disposal of the clipping through the passage thus created, a separation of the finished and of the waste products' of the machinevbeing thus obtained. It is desired, how' ever, to cover, broadly, herein the means and method of such separation.

1. The nail-guiding mechanism which consists of a knife-edge located immediately below the tangential line of contact of the rolls and to one side of the channel of the nail-tube, in combination with a pressure bar or spring arranged to maintain the nail-head in contact with the knife-edge, as specified.

2. A male and female nail-pointing die, one of the dies having a reciprocating motion toward the other, in combination with a guidefork normally extended under resilient pressure beyond the face of one of the dies, to receive and guide the nail into position relative to their cuttingedges,and with the spring for producing such pressure, as and for the purpose specified.

3. A fixed nail-pointing die, in combination with a reciprocating nail-pointing die, a piv- IOO IIO

oted arm to carry the latter die or punch, means for the retraction of the arm, and a cam for operating the arm, as and for the purpose specified.

4. A female nailpointing die formed. in halves, in combination with a socket-piece having an enlarged chamber and provided with set-screws f, whereby the halves of the die may be adjusted in position and secured therein, substantially as specied.

5. A nail-conducting chute open at one side, a nail-pointing die held outside of the chan nel of the chute, and a die or punch acting in conjunction therewith and adapted to carry the nail to the outside of the channel of the JOHN P. VENNERSTEN.

Witnesses:

SAMUEL B. DOVER, C. W. DAVENPORT. 

